CN220510325U - Electronic card connector - Google Patents

Abstract

The utility model discloses an electronic card connector, comprising: the device comprises an insulating base, a plurality of first conductive terminals, a plurality of second conductive terminals and a pair of balance terminals. The balance terminal is fixed on the side wall of the insulating base, and the elastic pressing arm of the balance terminal is used for clamping the side edge of the electronic card when the electronic card is inserted into the accommodating space and is contacted with the first elastic arm of the first conductive terminal. The sliding part of the balance terminal is used for sliding along the side wall when the elastic pressurizing arm clamps the electronic card and the electronic card is continuously inserted. The sliding part is used for entering the gap of the side wall when the electronic card is contacted with the second elastic arm of the second conductive terminal so as to release at least part of the clamping force.

Description

Electronic card connector

Technical Field

The present utility model relates to a connector, and more particularly to a connector for electronic cards.

Background

The conventional electronic card connector generally considers the problem of damage to the electronic card caused by oblique insertion during design, but rarely considers the problem of poor user experience caused by uneven stress in the process of inserting the electronic card.

For example, chinese patent publication No. CN2932674Y discloses an electronic card connector for inserting an electronic card, comprising: the electronic card comprises an insulating body, a plurality of conductive terminals, a locking spring piece, a supporting piece and a shielding shell, wherein the conductive terminals, the locking spring piece, the supporting piece and the shielding shell are accommodated in the insulating body; the support sheet includes a base portion held in the insulator body and a pair of elastic arms extending into the accommodation groove. The supporting sheet can guide the electronic card to be inserted in the correct direction, so that the problem of oblique insertion of the electronic card is solved.

However, the above-described electronic card connector does not pay attention to the variation in the insertion force of the electronic card. The support sheet in the above-described structure may cause the initial insertion force and the intermediate insertion force of the electronic card to vary. Specifically, in the initial stage of inserting the electronic card, the electronic card just contacts the supporting sheet, and the initial insertion force is smaller; and at an intermediate stage of inserting the electronic card, the electronic card contacts the conductive terminals with an increased intermediate insertion force.

The problem of varying insertion forces of electronic cards is particularly apparent in electronic card connectors having double rows of conductive terminals. Specifically, in an electronic card connector having double rows of conductive terminals, at an initial stage of inserting an electronic card, the electronic card is brought into contact with only the first row of conductive terminals, and its insertion force is small; in the middle stage of inserting the electronic card, the insertion force is increased sharply because the electronic card contacts the second row of conductive terminals while also maintaining contact with the first row of conductive terminals. Such imbalance or non-uniformity in insertion force may result in a poor user experience and even a user may not be dared to continue inserting the electronic card into the connector, thereby affecting the proper use of the electronic card and the electronic card connector.

Therefore, it is highly desirable to provide a new electronic card connector to solve the problem of poor user experience caused by uneven insertion force during the insertion process of the electronic card.

Disclosure of Invention

The utility model mainly aims to provide an electronic card connector, which can ensure that the insertion force of an electronic card is uniform and stable in the whole insertion stage, improve the quality of the electronic card connector and improve the experience of a user in inserting the card.

Other objects and advantages of the present utility model will be further appreciated from the technical features disclosed in the present utility model.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an electronic card connector, comprising: the device comprises an insulating base, a plurality of first conductive terminals arranged in a first row, a plurality of second conductive terminals arranged in a second row and a pair of balance terminals. The insulation base is provided with a bottom wall, two side walls oppositely arranged on the bottom wall, and an accommodating space and an inserting opening which are defined by the bottom wall and the side walls; the side wall is provided with a sliding surface facing the accommodating space, and a notch is formed at a position away from the bayonet. Each first conductive terminal is fixed in the bottom wall and provided with a first elastic arm, and at least one part of the first elastic arm stretches into the accommodating space, and the first elastic arm is close to the bayonet. Each second conductive terminal is fixed in the bottom wall and provided with a second elastic arm, and at least one part of the second elastic arm extends into the accommodating space away from the bayonet. The balance terminal is fixed on the side wall and comprises a fixed end, an elastic pressurizing arm and a sliding part which are sequentially arranged; wherein the fixed end is close to the bayonet; the elastic pressurizing arm is bent and extends along the side wall, and at least one part of the elastic pressurizing arm stretches into the accommodating space. The elastic pressing arm is used for clamping the side edge of the electronic card and applying clamping force to the electronic card when the electronic card is inserted into the accommodating space and is contacted with the first elastic arm. The sliding part is used for sliding along the sliding surface when the elastic pressing arm clamps the electronic card and the electronic card is continuously inserted. The sliding part is used for entering the notch when the electronic card is contacted with the second elastic arm, so that the elastic pressurizing arm releases at least part of the clamping force to the electronic card.

In one embodiment, the notch is adjacent to the sliding surface, and the sliding surface includes a cambered surface adjacent to the notch.

In one embodiment, the side wall has a proximal position near the bayonet, a middle position, and a distal position away from the bayonet; the notch is disposed at the end position or between the intermediate position and the end position.

In one embodiment, the first conductive terminals of the first row are arranged in parallel with the second conductive terminals of the second row, and the first elastic arms and the second elastic arms are also arranged in two parallel rows.

In one embodiment, the first conductive terminal further has a first fixing portion and a first tail portion; the first fixing part is U-shaped and is used for fixing the first conductive terminal in a first terminal fixing groove of the bottom wall; the first tail part is vertically bent downwards from one end of the first fixing part and extends out of the bottom surface of the bottom wall; the first elastic arm is of a barb-shaped structure formed by upward U-shaped bending from the other end of the first fixing part, and the barb-shaped structure is provided with a first contact part protruding towards the accommodating space and used for forming electric connection with the electronic card.

In one embodiment, the first conductive terminal further has a second fixing portion and a second tail portion; the second fixing part is linear and is used for fixing the second conductive terminal in a second terminal fixing groove of the bottom wall; the second tail part is vertically bent downwards from one end of the second fixing part and extends out of the bottom surface of the bottom wall; the second elastic arm is an inverted V-shaped structure formed by upward U-shaped bending from the other end of the second fixing part, and the inverted V-shaped structure is provided with a second contact part protruding towards the accommodating space and used for forming electric connection with the electronic card.

In one embodiment, the fixed end of the balanced terminal is fixed in a third terminal fixing groove of the side wall; the elastic pressurizing arm is L-shaped; the sliding part is a bulge facing the sliding surface.

In one embodiment, the insulating base further includes a retaining wall disposed on the bottom wall and perpendicular to the side wall, the retaining wall is disposed opposite to the insertion opening, and the accommodating space is defined by the bottom wall, the side wall and the retaining wall.

In one embodiment, the electronic card connector further comprises a bearing seat, a card withdrawing mechanism and a shell; the terminal module is fixed to the bearing seat; the bearing seat is provided with a top wall which is positioned above the accommodating space and used for limiting the accommodating space; the card withdrawing mechanism is mounted on the bearing seat and at least comprises a push rod and an elastic piece, one end of the push rod is connected to the elastic piece, penetrates through the through hole of the retaining wall, stretches into the accommodating space and faces the front edge of the electronic card, and the other end of the push rod stretches out of the bearing seat; the shell is used for covering the bearing seat.

Compared with the prior art, the electronic card connector provided by the utility model has the advantages that the clamping force can be applied to the electronic card in the first stage of the insertion of the electronic card by arranging the balance terminal, and the clamping force is unloaded in the second stage of the insertion of the electronic card, so that the insertion force is not greatly increased due to the fact that the electronic card contacts with the second elastic arm, the uniform and stable insertion of the electronic card in the whole insertion stage is ensured, and the card insertion experience of a user is improved.

Drawings

Fig. 1 is a schematic perspective view of a terminal module of an electronic card connector according to the present utility model.

Fig. 2 is a disassembled view of the terminal module shown in fig. 1.

Fig. 3 is a schematic perspective view of a terminal module of the electronic card connector according to another aspect of the utility model.

Fig. 4 is a disassembled view of the terminal module shown in fig. 3.

Fig. 5 is a plan view of the terminal module of the present utility model, mainly showing the position of the balanced terminals before the electronic card is inserted.

Fig. 6 is a plan view of the terminal module of the present utility model with the electronic card in a first stage of insertion.

Fig. 7 is a plan view of the terminal module of the present utility model with the electronic card in a second stage of insertion.

Fig. 8 is a schematic perspective view of an electronic card connector according to the present utility model.

Fig. 9 is a disassembled view of the electronic card connector shown in fig. 8.

Fig. 10 is a schematic cross-sectional view of the electronic card connector shown in fig. 8.

The reference numerals in the above figures are explained as follows:

insulation base 10 of electronic card connector 1

Bottom wall 11 first terminal fixing groove 110

Second terminal fixing groove 111 side wall 12

Slip plane 120 notch 121

Arc surface 122 vertical plane 123

The third terminal fixing groove 124 accommodates the space 13

Plug-in slot 14 retaining wall 15

Through hole 150 first conductive terminal 20

First contact portion 210 of first elastic arm 21

First tail portion 23 of first fixing portion 22

Second conductive terminal 30 second elastic arm 31

Second contact portion 310 second fixing portion 32

Second tail 33 balanced terminal 40

Elastic pressing arm 42 of fixed end 41

Free end 44 of slip portion 43

Bearing seat 60 of terminal module 50

Top wall 61 card withdrawal mechanism 70

Push rod 71 elastic member 72

Shell 80 electronic card 9

Front edge 91 side edge 92

Detailed Description

The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the utility model may be practiced. The directional terms referred to in the present utility model, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the utility model and is not limiting of the utility model.

Referring to fig. 1 to 4, an electronic card connector 1 of the present utility model is used for connecting an electronic card to a circuit board. The electronic card connector 1 includes an insulating base 10, a plurality of first conductive terminals 20 arranged in a first row, a plurality of second conductive terminals 30 arranged in a second row, and a pair of balanced terminals 40. In one embodiment, the insulating base 10, the first conductive terminal 20, the second conductive terminal 30 and the balanced terminal 40 together form a terminal module 50, and the terminal module 50 is connected to other components of the electronic card connector 1, which will be described in detail later.

As shown in fig. 2 and 4, the insulating base 10 has a bottom wall 11, two side walls 12 disposed opposite to the bottom wall 11, a receiving space 13 defined by the bottom wall 11 and the side walls 12, and a bayonet 14; the side wall 12 is provided with a sliding surface 120 facing the accommodating space 13, and the side wall 12 forms a notch 121 at a position far away from the bayonet 14.

In one embodiment, as shown in fig. 2 and 4, the notch 121 is adjacent to the sliding surface 120. The sliding surface 120 includes a cambered surface 122 adjacent to the notch 121 and a vertical plane 123 connected to the cambered surface 122.

In one embodiment, as shown in fig. 2 and 4, the insulating base 10 further includes a retaining wall 15 disposed on the bottom wall 11 and perpendicular to the side wall 12, and the accommodating space 13 is defined by the bottom wall 11, the side wall 12 and the retaining wall 15. The bayonet 14 is disposed opposite to the retaining wall 15.

In one embodiment, as shown in fig. 2 and 4, the side wall 12 has a proximal position near the insertion opening 14, a middle position, and a distal position away from the insertion opening 14. The notch 121 is disposed at the end position of the side wall 12, as shown in fig. 2. However, in other embodiments, the notch 121 may also be disposed between the intermediate position and the end position. That is, in a specific design, the position of the notch 121 in the present utility model may be appropriately adjusted according to the actual product structure and size.

Further, in one embodiment, as shown in fig. 2 and 4, a row of first terminal fixing grooves 110 and a row of second terminal fixing grooves 111 are provided on the bottom wall 11 for fixing the first conductive terminals 20 and the second conductive terminals 30, respectively. A third terminal fixing groove 124 is provided on the side wall 12 for fixing the balanced terminal 40. Specifically, the third terminal fixing groove 124 is disposed at a proximal position of the side wall 12.

As shown in fig. 1 and 3, the first conductive terminals 20 of the first row and the second conductive terminals 30 of the second row are disposed in parallel in the bottom wall 11, and the first conductive terminals 20 of the first row are closer to the card slot 14 than the second conductive terminals 30 of the second row.

As shown in fig. 1 and 3, each first conductive terminal 20 is fixed in the bottom wall 11 and has a first elastic arm 21, and the first elastic arm 21 is close to the bayonet 14 and at least a part of the first elastic arm extends into the accommodating space 13; likewise, each of the second conductive terminals 30 is fixed in the bottom wall 11 and has a second elastic arm 31, and the second elastic arm 31 is far away from the card slot 14 and at least a part of the second elastic arm extends into the accommodating space 13.

As shown in fig. 2 and 4, the first conductive terminal 20 further has a first fixing portion 22 and a first tail portion 23. The first fixing portion 22 is U-shaped and is used for fixing the first conductive terminal 20 in the first terminal fixing groove 110. The first tail portion 23 is bent vertically downward from one end of the first fixing portion 22 and extends out of the bottom surface of the bottom wall 11, so as to connect the first conductive terminal 20 to the circuit board. The first elastic arm 21 is a barb-shaped structure, which is formed by U-shaped bending upwards from the other end of the first fixing portion 22, and most of the barb-shaped structure is exposed in the accommodating space 13. The barb-like structure has a first contact portion 210 protruding towards the receiving space 13. The first elastic arm 21 is used for providing elastic contact force for the electronic card, and the first contact portion 210 is used for forming electrical connection with the electronic card.

As shown in fig. 2 and 4, the second conductive terminal 30 further has a second fixing portion 32 and a second tail portion 33. The second fixing portion 32 is linear and is used for fixing the second conductive terminal 30 in the second terminal fixing groove 111. The second tail portion 33 is bent vertically downward from one end of the second fixing portion 32 and extends out of the bottom surface of the bottom wall 11, so as to connect the second conductive terminal 30 to the circuit board. The second elastic arm 31 is an inverted V-shaped structure, which is formed by bending upwards from the other end of the second fixing portion 32, and most of the inverted V-shaped structure is exposed in the accommodating space 13. The inverted V-shaped structure has a second contact portion 310 protruding toward the receiving space 13. The second elastic arm 31 is used for providing elastic contact force for the electronic card, and the second contact portion 310 is used for forming electrical connection with the electronic card.

In one embodiment, the first elastic arms 21 and the second elastic arms 31 are respectively arranged in two parallel rows, and the first elastic arms 21 are closer to the card slot 14. The first tail portion 23 and the second tail portion 33 are disposed opposite to each other, the first tail portion 23 is close to the insertion opening 14, and the second tail portion 33 is close to the retaining wall 15.

As shown in fig. 1 and 3, the balanced terminal 40 is fixed to the side wall 12.

As shown in fig. 2 and 4, the balance terminal 40 includes a fixed end 41, an elastic pressing arm 42, and a sliding portion 43, which are sequentially disposed. The fixing end 41 is adjacent to the card slot 14, and the fixing end 41 is fixed in the third terminal fixing groove 124.

Fig. 1, 3 and 7 show a deformed state of the elastic pressing arm 42 after the electronic card is completely inserted into the receiving space 13, and fig. 5 shows an original state of the elastic pressing arm 42 when the electronic card is not inserted into the receiving space 13. In detail, as shown in fig. 5, when the electronic card is not inserted into the accommodating space 13, the elastic pressing arm 42 is bent along the side wall 12 and extends at least partially into the accommodating space 13. In one embodiment, the resilient pressing arm 42 is L-shaped. The sliding portion 43 is a protrusion, such as a circular arc protrusion, facing the sliding surface 120, and can smoothly slide along the sliding surface 120 into the notch 121 under the action of an external force, as shown in fig. 1, 3 and 7. In one embodiment, the balanced terminal 40 further has a free end 44, and the free end 44 is far away from the insertion opening 14 and faces the retaining wall 15; the glide 43 is adjacent the free end 44.

Wherein the elastic pressing arm 42 is used for clamping the side edge of the electronic card when the electronic card is inserted into the accommodating space 13 and contacts with the first elastic arm 21, and applying clamping force to the electronic card.

The sliding portion 43 is configured to slide along the sliding surface 120 when the elastic pressing arm 42 clamps the electronic card and the electronic card continues to be inserted.

Wherein the sliding portion 43 is configured to enter the notch 121 when the electronic card contacts the second elastic arm 31, so that the elastic pressing arm 42 releases at least a portion of the clamping force on the electronic card.

According to the electronic card connector 1, the balance terminals 40 are arranged, so that the uniform and stable insertion force of the electronic card in the whole insertion stage can be ensured, the quality of the electronic card connector 1 is improved, and the card insertion experience of a user is improved.

The card insertion process and the operation principle of the electronic card connector 1 of the present utility model will be described in detail with reference to fig. 5, 6 and 7.

As shown in fig. 5, when the electronic card 9 is not inserted into the accommodating space 13 of the electronic card connector 1, at least a portion of the elastic pressing arm 42 of the balanced terminal 40 extends into the accommodating space 13, and the sliding portion 43 may or may not abut against the sliding surface 120. In the embodiment shown in fig. 5, the glide 43 rests on the glide plane 120.

As shown in fig. 6, in the first stage of inserting the electronic card 9 into the accommodating space 13 of the electronic card connector 1, the front edge 91 of the electronic card 9 just contacts the first elastic arm 21 of the first conductive terminal 20, and the side edge 92 of the electronic card 9 contacts the elastic pressing arm 42, so as to be held by the elastic pressing arm 42. At this time, the continued insertion of the electronic card 9 will be subjected to two types of resistance, the first resistance being the frictional resistance applied to the electronic card 9 by the first elastic arm 21; the second resistance is a resistance generated by the clamping force applied to the electronic card 9 by the elastic pressing arm 42. At this time, the user perceives the resultant force of the first resistance and the second resistance.

In the first stage, as the electronic card 9 continues to be inserted, the front edge thereof slides over the first elastic arm 21, and the balanced terminal 40 is forced to be spread outward. At this time, the bottom of the electronic card 9 is in electrical contact with the first contact portion 210, and although the frictional resistance (i.e. the first resistance) is slightly reduced, the sliding portion 43 slides along the sliding surface 120 against the sliding surface 120 at this time, so that the clamping force received by the side 92 of the electronic card 9 is slightly increased, resulting in a slight increase in the second resistance. At this point, the resultant force perceived by the user is substantially constant, and thus the insertion force is substantially constant.

As shown in fig. 7, in the second stage of inserting the electronic card 9 into the accommodating space 13 of the electronic card connector 1, the sliding portion 43 enters the notch 121 from the sliding surface 120 immediately after the front edge 91 of the electronic card 9 contacts the second elastic arm 31 of the second conductive terminal 30. At this time, the electronic card 9 continues to be inserted, and the frictional resistance (i.e., the first resistance) applied to the electronic card 9 by the first elastic arm 21 and the frictional resistance (may be referred to as a third resistance) applied to the electronic card 9 by the second elastic arm 31 are received. However, as the sliding portion 43 enters the notch 121, the holding force applied by the elastic pressing arm 42 to the side 92 of the electronic card 9 is drastically reduced, resulting in a drastic reduction in the second resistance. Thus, the newly added third resistance and the sharply reduced second resistance will leave the resultant force perceived by the user substantially unchanged, so that the insertion force is also substantially unchanged.

In summary, in the electronic card connector 1 of the present utility model, the balance terminal 40 is provided, so that the clamping force can be applied to the electronic card in the first stage of inserting the electronic card, and the clamping force is unloaded in the second stage of inserting the electronic card, so that the insertion force is not increased rapidly due to the contact of the electronic card with the second elastic arm 31, thereby ensuring uniform insertion force and stable insertion of the electronic card in the whole insertion stage, and improving the experience of the user in inserting the card.

As shown in fig. 8, 9 and 10, the electronic card connector 1 of the present utility model further includes a carrier 60, a card eject mechanism 70 and a housing 80.

The terminal module 50 is fixed to the carrier 60. The bearing seat 60 has a top wall 61 above the accommodating space 13, and is used for defining the accommodating space 13 and serving as a top of the accommodating space 13.

The card withdrawal mechanism 70 is mounted to the carrying seat 60, the card withdrawal mechanism 70 includes at least a push rod 71 and an elastic member 72, the push rod 71 is connected to the elastic member 72, a through hole 150 (reference numerals see fig. 1 and 9) passing through the retaining wall 15 protrudes into the accommodating space 13 and faces the front edge 91 of the electronic card 9, and the other end of the push rod 71 protrudes out of the carrying seat 60.

The housing 80 is used to cover the carrier 60 to secure or protect the internal components.

Claims (9)

1. An electronic card connector, comprising: the device comprises an insulating base, a plurality of first conductive terminals arranged in a first row, a plurality of second conductive terminals arranged in a second row and a pair of balance terminals;

the insulation base is provided with a bottom wall, two side walls oppositely arranged on the bottom wall, and an accommodating space and an inserting opening which are defined by the bottom wall and the side walls; the side wall is provided with a sliding surface facing the accommodating space, and a notch is formed at a position away from the bayonet;

each first conductive terminal is fixed in the bottom wall and provided with a first elastic arm, and at least one part of the first elastic arm stretches into the accommodating space, wherein the first elastic arm is close to the bayonet;

each second conductive terminal is fixed in the bottom wall and provided with a second elastic arm, and at least one part of the second elastic arm extends into the accommodating space away from the bayonet;

the balance terminal is fixed on the side wall and comprises a fixed end, an elastic pressurizing arm and a sliding part which are sequentially arranged; wherein the fixed end is close to the bayonet; the elastic pressurizing arm is bent and extends along the side wall, and at least one part of the elastic pressurizing arm extends into the accommodating space;

the elastic pressurizing arm is used for clamping the side edge of the electronic card and applying clamping force to the electronic card when the electronic card is inserted into the accommodating space and is contacted with the first elastic arm;

the sliding part is used for sliding along the sliding surface when the elastic pressurizing arm clamps the electronic card and the electronic card is continuously inserted;

the sliding part is used for entering the notch when the electronic card is contacted with the second elastic arm, so that the elastic pressurizing arm releases at least part of the clamping force to the electronic card.

2. The electronic card connector of claim 1, wherein: the notch is adjacent to the sliding surface, and the sliding surface comprises an arc surface close to the notch.

3. The electronic card connector of claim 2, wherein: the side wall is provided with a near end position, a middle position and a tail end position, wherein the near end position is close to the bayonet, and the tail end position is far away from the bayonet;

the notch is disposed at the end position or between the intermediate position and the end position.

4. The electronic card connector of claim 1, wherein: the first conductive terminals of the first row are arranged in parallel with the second conductive terminals of the second row, and the first elastic arms and the second elastic arms are also arranged in two parallel rows.

5. The electronic card connector of claim 4, wherein: the first conductive terminal is also provided with a first fixing part and a first tail part;

the first fixing part is U-shaped and is used for fixing the first conductive terminal in a first terminal fixing groove of the bottom wall;

the first tail part is vertically bent downwards from one end of the first fixing part and extends out of the bottom surface of the bottom wall;

the first elastic arm is of a barb-shaped structure formed by upward U-shaped bending from the other end of the first fixing part, and the barb-shaped structure is provided with a first contact part protruding towards the accommodating space and used for forming electric connection with the electronic card.

6. The electronic card connector of claim 4, wherein: the first conductive terminal is also provided with a second fixing part and a second tail part;

the second fixing part is linear and is used for fixing the second conductive terminal in a second terminal fixing groove of the bottom wall;

the second tail part is vertically bent downwards from one end of the second fixing part and extends out of the bottom surface of the bottom wall;

the second elastic arm is an inverted V-shaped structure formed by upward U-shaped bending from the other end of the second fixing part, and the inverted V-shaped structure is provided with a second contact part protruding towards the accommodating space and used for forming electric connection with the electronic card.

7. The electronic card connector of claim 1, wherein: the fixed end of the balance terminal is fixed in a third terminal fixing groove of the side wall;

the elastic pressurizing arm is L-shaped;

the sliding part is a bulge facing the sliding surface.

8. The electronic card connector of claim 1, wherein: the insulating base further comprises a retaining wall which is arranged on the bottom wall and perpendicular to the side wall, the retaining wall and the inserting opening are oppositely arranged, and the accommodating space is jointly limited by the bottom wall, the side wall and the retaining wall.

9. The electronic card connector of claim 8, wherein: the device also comprises a bearing seat, a card withdrawing mechanism and a shell;

the terminal module is fixed to the bearing seat; the bearing seat is provided with a top wall which is positioned above the accommodating space and used for limiting the accommodating space;

the card withdrawing mechanism is mounted on the bearing seat and at least comprises a push rod and an elastic piece, one end of the push rod is connected to the elastic piece, penetrates through the through hole of the retaining wall, stretches into the accommodating space and faces the front edge of the electronic card, and the other end of the push rod stretches out of the bearing seat;

the shell is used for covering the bearing seat.